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Setting Time, Strength and Rebound Rate of Shotcrete according In Accelerators

급결제에 따른 숏크리트의 응결, 강도 및 리바운드율

  • Lee Seong-Haeng (Dept. of civil Engineering, Miryang Nation University) ;
  • Kim Yong-Ha (Nungdong Tunnel Project, Samsung Construction) ;
  • Hahm Hyung-Gil (Dept. of civil Engineering, Miryang Nation University) ;
  • Kim Kwan-Jin (Dept. of civil Engineering, Miryang Nation University)
  • 이성행 (밀양대학교 토목공학과) ;
  • 김용하 (삼성물산(주) 능동터널현장) ;
  • 함형길 (밀양대학교 토목공학과) ;
  • 김관진 (밀양대학교 토목공학과)
  • Published : 2005.06.01

Abstract

An experimental investigation was carried out in order to verify the compressive strength, flexural strength, equivalent bending strength, rebound rate of shotcrete according to silicate accelerator, aluminate accelerator, cement mineral accelerator respectively and to especially evaluate the performance of shotcrete using cement mineral accelerator for high quality. The test result of compressive strength was showed that all accelerators were satisfied the required test value for each age, for the requirement of having the $75\%$ or higher compressive strength ratio to plain concretes at 28 days, cement mineral accelerator with $87\%$ compressive strength ratio was only satisfied. In flexural strength test, cement mineral accelerator was satisfied the flexural strength requirement in steel fiber reinforced shotcrete for each age. Aluminate type was conformed to the requirement for 28 days, but not at 1 day, silicate type was failed to satisfy standard requirement. Rebound rate was measured between $11{\~}19\%$ and cement mineral accelerator was showed comparatively lower rebound rate. Based on the test results, cement mineral accelerator exhibited excellent strength improvement and lower rebound rate compared to the conventional accelerator, its result is showed the possibility of making high performance shotcrete.

References

  1. 김용하, 박해균, 이명섭, 김재권, 이철우, '분말형 시멘트 광물계 급결제를 사용한 습식 숏크리트 시공 사례연구', 한국터널공학회 학술발표회 논문집, 2003, pp.45-48
  2. 김진철, 류종현, '숏크리트용 급결재를 첨가한 시멘트 모르타르의 응결 및 강도 특성', 콘크리트학회 논문집, Vol.16, No.1, 2004. 2, pp.70-78
  3. 원종필, 백철우, 박찬기, 전언중, '알칼리 프리계 급결제를 사용한 강섬유 보강 숏크리트의 성능 평가', 한국농공학회논문집, Vol.46, No.3, 2004. 5, pp.65-72
  4. 김상현, 김준우, 현경훈, 조남섭, 김길환, '시멘트광물계 및 액상급결제를 사용한 숏크리트의 특성 비교', 제30회 시멘트심포지엄 한국양회공업협회.한국세라믹협회, 2003, pp.239-247
  5. E. Grav., 'Active Design in Civil Tunnelling with spray Concrete as a Permanent', International Conference on Engineering Developments in Shotcret. Auatralia, 2001, pp.123-133
  6. 한국도로공사, 고속도로공사 전문시방서, 한국도로공사, 2001, pp.8-24
  7. 한국도로공사, 공사현장 품질관리실무, 한국도로공사, 2001, pp.364-368
  8. 부산지방국토관리청, '산외-상북간 제3공구(능동터널) 국도확장공사 시방서', 부산지방국토관리청, 2000
  9. 건설교통부, 터널표준시방서, 한국터널공학회, 1997
  10. 한국콘크리트학회, 콘크리트표준시방서 해설, 한국콘크리트학회, 2000, pp.483-486
  11. 한국표준협회, KS L 5103 길모어 침에 의한 시멘트 페이스트 응결시간 시험방법, 한국표준협회, 1996
  12. 한국표준협회, KS F 2405 콘크리트의 압축강도 시험방법, 한국표준협회, 2001
  13. 한국표준협회, KS F 2408 콘크리트의 휨강도 시험방법, 한국표준협회, 2001
  14. 한국표준협회, KS F 2413 휨강도 시험한 공시체로 콘크리트 압축강도를 시험하는 방법, 한국표준협회, 2001
  15. 한국표준협회, KS F 2566 강섬유보강 콘크리트의 휨인성 시험방법, 한국표준협회, 2001

Cited by

  1. Study on the characteristic of liner and cover material by accelerating agent type vol.27, pp.2, 2018, https://doi.org/10.5322/JESI.2018.27.2.75